I can't remember if we have talked about Pholus.
Basically, it is a turning point, like letting the genie out of the bottle or opening Pandora's box if I understand correctly. Remember Susan Boyle singing on Britain's Got Talent? That is a Pholus type of event.
My natal Pholus is 23 Aquarius. I know of one time when things blew up in my face and I checked my chart. Transiting Pholus was square my Midheaven plus oddly, it was at 27 degrees, 27 minutes and 27 seconds.
Do you have any Pholus stories?
Never heard of this before but I looked it up and mine is conjunct my Midheaven 
Should I be worried........
ST’s Pholus was 13 degrees Pisces in the 1st house.
Mine is 16 Pisces in the 3rd house.
Ohh look where Neptune is now....14 degrees and retrograde. I get a breather before it hits later.
Fuck fuck fuck a duck I say.
Hmm...
Pholus squared my Ascendant exact when my first sibling was born. We get along now, but not while growing up.
When I met ST, Pholus was hitting my Venus in the 9th house. We met in high school.
Pholus crossed my Ascendant and I lost my job of nearly 16 years.
No, don't worry. I would look for transits to it or transits from it to other natal placements.
I wonder though if it is similar to the Vertex where sometimes something happens and sometimes nothing happens.